Hi Maintainer

pybj fails to build its extension, but the build still succeeds.
Noticed in the recent rebuild for Python 3.12 only [1].  I've copied
what I hope is the relevant part of the log below.

Regards
Graham


[1] https://buildd.debian.org/status/fetch.php?pkg=pybj&arch=amd64&ver=0.2.6-2%2Bb1&stamp=1720780666&raw=0


running build
running build_py
running build_ext
building '_bjdata' extension
x86_64-linux-gnu-gcc -fno-strict-overflow -Wsign-compare -DNDEBUG -g
-O2 -Wall -g -O2 -Werror=implicit-function-declaration
-ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong
-fstack-clash-protection -Wformat -Werror=format-security
-fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC
-I/usr/include/python3.12 -c src/_bjdata.c -o
build/temp.linux-x86_64-cpython-312/src/_bjdata.o -std=c99
-DUSE__BJDATA
x86_64-linux-gnu-gcc -fno-strict-overflow -Wsign-compare -DNDEBUG -g
-O2 -Wall -g -O2 -Werror=implicit-function-declaration
-ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong
-fstack-clash-protection -Wformat -Werror=format-security
-fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC
-I/usr/include/python3.12 -c src/decoder.c -o
build/temp.linux-x86_64-cpython-312/src/decoder.o -std=c99
-DUSE__BJDATA
src/decoder.c:20:10: fatal error: numpy/arrayobject.h: No such file or directory
   20 | #include <numpy/arrayobject.h>
      |          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
/<<PKGBUILDDIR>>/setup.py:64: UserWarning: Extension module _bjdata:
The output above this warning shows how the compilation failed.
  warnings.warn("Extension module %s: The output above this warning
shows how the compilation failed."
command '/usr/bin/x86_64-linux-gnu-gcc' failed with exit code 1
running install_lib

user debian-python@lists.debian.org
usertags 1076206 python3.15
tags 1076206 patch
thanks

Hi!

While rebuilding the python related packages against the Python 3.15rc2
version I ran into this failure [1].

In order to solve it, I have:
- Dropped the broken numpy dependency
- Updated debian/control to rely on dh-sequence-numpy3 instead of
   setting the abi manually
- Backported upstream commit a46355a0: fix pip ext compilation error,
   [2] to add include_dirs=[numpy.get_include()] and import numpy in
   setup.py.
- Added patch to replace deprecated PyArray_* constants with NPY_*.
- Updated the recursion patch "C extension does not use Python recursion
   limit in Python 3.12+"

I've applied these fixes in the sandbox [3] to verify that it builds
successfully and that the extension is present in the result. These
fixes should be applied in Debian to get the package back to a healthy
state.

Happy hacking,

[1]: https://debusine.debian.net/debian/r-python-python3.15/artifact/TODO/
[2]: https://github.com/NeuroJSON/pybj/commit/a46355a0b0df0bec1817b04368a5a573358645ef
[3]: https://debusine.debian.net/debian/r-python-python3.15/

We believe that the bug you reported is fixed in the latest version of
pybj, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1076206@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Maximiliano Curia <maxy@debian.org> (supplier of updated pybj package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 05 Oct 2026 17:31:48 +0200
Source: pybj
Architecture: source
Version: 0.2.6-3
Distribution: unstable
Urgency: medium
Maintainer: Debian Science Team <debian-science-maintainers@lists.alioth.debian.org>
Changed-By: Maximiliano Curia <maxy@debian.org>
Closes: 1076204 1076206
Changes:
 pybj (0.2.6-3) unstable; urgency=medium
 .
   * Team upload (Closes: #1076206).
   * Update packaging to rely on dh-sequence-numpy3
   * Add patch backporting upstream commit a46355a0:
     0002-fix-pip-ext-compilation-error.patch
   * Add patch to replace deprecated PyArray_* constants with NPY_*.
     0003-numpy2-support.patch (Closes: #1076204)
   * Update the recursion patch as C extensions do not use the recursion limit
     for Py 3.12+.
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